Diametric slider block pump

ABSTRACT

A pump includes a base, a rotor, a slider block, a cover, and a drive member. Thus, the pump is used to pump the fluid in two opposite directions by changing the rotation direction of the rotor without having to change the parts of the pump, thereby enhancing the versatility of the pump, and thereby facilitating a user operating the pump. In addition, the pump has a simple apparatus with a lighter weight and smaller volume, thereby decreasing the space of operation and storage.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a pump, and more particularly to a diametric slider block pump.

2. Description of the Related Art

A conventional pump, U.S. Pat. No. 6,000,921, in accordance with the prior art shown in FIGS. 1 and 2 comprises a base 1, a cover 4, an outer ring 2, a slide strip 6, and a rotation disk 3. The base 1 has a central portion formed with an annular wall 101 and a slideway 102 extended through the annular wall 101. The cover 4 is mounted on the base 1. The outer ring 2 is mounted between the base 1 and the cover 4, and an annular flow channel 5 is formed between the inner wall of the outer ring 2 and the annular wall 101 of the base 1. The outer ring 2 has a bottom formed with two slots 201 facing the slideway 102 of the base 1. The outer ring 2 has a periphery provided with two opposite first check valves 501 connected to the flow channel 5 and two opposite second check valves 502 connected to the flow channel 5. The slide strip 6 is mounted between the base 1 and the outer ring 2 and slidably mounted in the slideway 102 of the base 1. The slide strip 6 has a mediate portion movably mounted in the annular wall 101 of the base 1 and formed with two limit walls 601 and a movable space 602 located between the two limit walls 601. The slide strip 6 has a first end formed with a first recess 603 and a second end formed with a second recess 604. The rotation disk 3 is rotatably mounted on the annular wall 101 of the base 1 and has a first side formed with a propeller shaft 301 passes through the cover 4 and connected to and rotated by an actuating device (not shown), such as a motor, engine or the like, so that the rotation disk 3 is rotated by the propeller shaft 301. The rotation disk 3 has a second side formed with a push block 302 movably mounted in the flow channel 5 to push the fluid in the flow channel 5. A limit rod 303 is eccentrically mounted on the second side of the rotation disk 3 to rotate therewith and movably mounted in the movable space 602 of the slide strip 6 to move the slide strip 6 linearly.

In operation, when the rotation disk 3 is rotated by the propeller shaft 301, the limit rod 303 is rotated with the rotation disk 3 to move the slide strip 6 linearly and reciprocally, and the push block 302 is movable in the flow channel 5 to push the fluid in the flow channel 5, so that the fluid is introduced from the first check valves 501 to the second check valves 502, thereby pumping the fluid.

However, the conventional pump is used to pump the fluid in a determined direction and cannot pump the fluid in the opposite direction, thereby decreasing the versatility of the conventional pump.

SUMMARY OF THE INVENTION

The primary objective of the present invention is to provide a pump that is used to pump the fluid in two opposite directions by changing the rotation direction of the rotor without having to change the parts of the pump, thereby enhancing the versatility of the pump, and thereby facilitating a user operating the pump.

Another objective of the present invention is to provide a pump having a simple apparatus with a lighter weight and smaller volume, thereby decreasing the space of operation and storage.

In accordance with the present invention, there is provided a pump, comprising:

a base including a disk and an annular wall formed on a periphery of the disk, the annular wall of the base having an inner periphery formed with two radially opposite inward protruding arc-shaped flanges and an outer periphery formed with two radially opposite outward protruding connecting tubes each connected to the inner periphery of the annular wall of the base;

a rotor rotatably mounted in the annular wall of the base and having a first side formed with a slideway, the rotor having an outer periphery rested on an inner arcuate face of each of the flanges of the annular wall of the base, thereby forming two radially opposite arc-shaped flow channels between the inner periphery of the annular wall of the base and the outer periphery of the rotor;

a slider block slidably mounted in the slideway of the rotor reciprocally and having a mediate portion formed with an insertion recess, the slider block having an axial length smaller than that of the slideway of the rotor, so that two storage chambers are defined between the slideway of the rotor and two ends of the slider block and are connected to the two flow channels respectively;

a cover mounted on the annular wall of the base to close the two flow channels;

a pivot shaft secured on a bottom of the cover; and

a drive member rotatably mounted on the pivot shaft and inserted into the insertion recess of the slider block so that the slider block is slidable on the drive member.

Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded perspective view of a conventional pump in accordance with the prior art;

FIG. 2 is a schematic plan operational view of the conventional pump as shown in FIG. 1;

FIG. 3 is a perspective view of a pump in accordance with the preferred embodiment of the present invention;

FIG. 4 is an exploded perspective view of the pump as shown in FIG. 3;

FIG. 5 is a partially plan cross-sectional view of the pump as shown in FIG. 3;

FIG. 6 is a cross-sectional view of the pump taken along line 6-6 as shown in FIG. 5;

FIG. 7 is a schematic operational view of the pump as shown in FIG. 6;

FIG. 8 is a schematic operational view of the pump as shown in FIG. 7;

FIG. 9 is a schematic operational view of the pump as shown in FIG. 8;

FIG. 10 is a schematic operational view of the pump as shown in FIG. 9;

FIG. 11 is a schematic operational view of the pump as shown in FIG. 10;

FIG. 12 is a schematic reverse operational view of the pump as shown in FIG. 6;

FIG. 13 is a schematic operational view of the pump as shown in FIG. 12;

FIG. 14 is a schematic operational view of the pump as shown in FIG. 13; and

FIG. 15 is a partially plan cross-sectional view of a pump in accordance with another embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

Referring to the drawings and initially to FIGS. 3-6, a pump in accordance with the preferred embodiment of the present invention comprises a base 10, a rotor 20, a slider block 30, a cover 50, and a drive member 40.

The base 10 includes a disk 11 (see FIG. 5) and an annular wall 12 formed on a periphery of the disk 11. The annular wall 12 of the base 10 has an inner periphery formed with two radially opposite inward protruding arc-shaped flanges 14 and 14′ and an outer periphery formed with two radially opposite outward protruding connecting tubes 13 and 13′ each connected to the inner periphery of the annular wall 12 of the base 10. The flanges 14 and 14′ of the base 10 are located between the connecting tubes 13 and 13′, and an included angle of 90 degrees is defined between each of the flanges 14 and 14′ and each of the connecting tubes 13 and 13′. The outer periphery of the annular wall 12 of the base 10 is formed with a plurality of fixing ears 16. The disk 11 of the base 10 has a center formed with a shaft hole 15.

The rotor 20 is a circular block rotatably mounted in the annular wall 12 of the base 10. The rotor 20 has an outer periphery closely rested on an inner arcuate face of each of the flanges 14 and 14′ of the annular wall 12 of the base 10, thereby forming two radially opposite arc-shaped flow channels 60 and 60′ between the inner periphery of the annular wall 12 of the base 10 and the outer periphery of the rotor 20. Each of the two flow channels 60 and 60′ is located between the flanges 14 and 14′ of the base 10 in a symmetric manner and is connected to a respective one of the connecting tubes 13 and 13′ of the base 10. The rotor 20 has a first side formed with a slideway 24. The slideway 24 of the rotor 20 is radially extended through an axial center of the rotor 20 and through the outer periphery of the rotor 20 and has a width matching that of each of the flanges 14 and 14′ of the base 10. The rotor 20 has a second side axially formed with a protruding shaft 21 rotatably mounted in and protruded outward from the shaft hole 15 of the base 10. The shaft 21 of the rotor 20 is connected to and rotated by an actuating device (not shown), such as a motor, engine or the like, so that the rotor 20 is rotatable in the base 10 about the shaft 21. The pump further comprises a shaft seal 22 and a bearing 23 each mounted between the shaft 21 and the shaft hole 15 of the base 10.

The slider block 30 is slidably mounted in the slideway 24 of the rotor 20 reciprocally and has two ends each having an arcuate face matching the inner arcuate face of each of the flanges 14 and 14′ of the base 10, so that when the slider block 30 is slidable in the slideway 24 of the rotor 20 reciprocally, each of the two ends of the slider block 30 is closely urged on the inner arcuate face of a respective one of the flanges 14 and 14′ of the base 10. The slider block 30 has an axial length smaller than that of the slideway 24 of the rotor 20, so that two storage chambers 62 (see FIG. 6) and 62′ (see FIG. 8) are defined between the slideway 24 of the rotor 20 and the two ends of the slider block 30 and are connected to the two flow channels 60 and 60′ respectively. The slider block 30 has a mediate portion formed with an insertion recess 31.

The cover 50 is mounted on the annular wall 12 of the base 10 to close the two flow channels 60 and 60′, and a seal ring 71 is mounted between the cover 50 and the annular wall 12 of the base 10 to provide a sealing effect. The cover 50 has a periphery formed with a plurality of fixing ears 51 fixed on the fixing ears 16 of the base 10 by a plurality of bolts 72 and a plurality of nuts 73. A pivot shaft 42 is secured on a bottom of the cover 50.

The drive member 40 is rotatably mounted on the pivot shaft 42 and inserted into the insertion recess 31 of the slider block 30 so that the slider block 30 is slidable on the drive member 40. The pivot shaft 42 has an axial center parallel with that of the rotor 20 and the cover 50. The axial center of the pivot shaft 42 is located at a connecting line between the flanges 14 and 14′ of the base 10. The axial center of the pivot shaft 42 aligns with that of the drive member 40 and deviates from that of the rotor 20, so that the axial center of the drive member 40 deviates from that of the rotor 20. Thus, when the rotor 20 is rotated, the drive member 40 is rotatable on the pivot shaft 42, thereby forming a relative sliding motion between the slider block 30 and the drive member 40 to drive the slider block 30 to slide in the slideway 24 of the rotor 20 reciprocally to change the dimension of the two storage chambers 62 and 62′ so as to pump and deliver the fluid.

In operation, referring to FIGS. 7-11 with reference to FIGS. 3-6, when a first end of the slider block 30 is closely urged on the inner arcuate face of the flange 14 of the base 10 as shown in FIG. 7, the storage chamber 62 is defined between a second end of the slider block 30 and the other flange 14′ of the base 10 as shown in FIG. 7. At this time, the connection between the storage chamber 62 and the two flow channels 60 and 60′ is interrupted by the two side walls of the slideway 24 of the rotor 20 and the inner arcuate face of the other flange 14′ of the base 10.

When the shaft 21 of the rotor 20 is rotated by the actuating device, the rotor 20 is rotated in the base 10 about the shaft 21 to rotate the slider block 30. At this time, the wall of the insertion recess 31 of the slider block 30 drives the drive member 40 to rotate, so that the drive member 40 is rotatable on the pivot shaft 42, thereby forming a relative sliding motion between the slider block 30 and the drive member 40 to drive the slider block 30 to slide in the slideway 24 of the rotor 20.

When the slider block 30 is moved from the flange 14 to the other flange 14′ of the base 10, the other storage chamber 62′ is defined between the first end of the slider block 30 and the flange 14 of the base 10 as shown in FIG. 8. At this time, the storage chamber 62 is connected to the other flow channel 60′ and the other storage chamber 62′ is connected to the flow channel 60 as shown in FIG. 8. In addition, the volume of the storage chamber 62 is reduced gradually, and the volume of the other storage chamber 62′ is increased gradually during the sliding motion of the slider block 30.

In such a manner, the flow channel 60 and the other storage chamber 62′ form a negative pressure by the sliding motion of the slider block 30, to introduce the fluid in the connecting tube 13 the base 10 is introduced into the flow channel 60 and the other storage chamber 62′ as shown in FIG. 8. At this time, the fluid contained in the storage chamber 62 and the other flow channel 60′ is forced into the other connecting tube 13′ the base 10 by compression of the slider block 30 as shown in FIG. 8.

As shown in FIGS. 9 and 10, when the slider block 30 is moved successively, the volume of the storage chamber 62 is reduced gradually, and the volume of the other storage chamber 62′ is increased gradually, so that the fluid is introduced from the connecting tube 13 the base 10 into the flow channel 60 and the other storage chamber 62′ and the fluid contained in the storage chamber 62 and the other flow channel 60′ is forced into the other connecting tube 13′ the base 10 by compression of the slider block 30.

As shown in FIG. 11, when the rotor 20 is rotated through 180 degrees, the slider block 30 is moved in the other end of the slideway 24 of the rotor 20. At this time, the second end of the slider block 30 is closely urged on the inner arcuate face of the flange 14 of the base 10 so that the storage chamber 62 disappears, while the other storage chamber 62′ faces the other flange 14′ of the base 10 to store the fluid.

Thus, when the rotor 20 is rotated successively, the slider block 30 is driven by the drive member 40 to slide in the slideway 24 of the rotor 20 reciprocally to form a piston action, so that the fluid is introduced from the connecting tube 13 the base 10 through the flow channel 60 and the other flow channel 60′ into the other connecting tube 13′ the base 10 by reciprocating movement of the slider block 30 so as to pump the fluid successively.

As shown in FIGS. 12-14, when the rotor 20 is rotated in the reverse direction, the slider block 30 is moved in the reverse direction, so that the fluid is introduced from the other connecting tube 13′ the base 10 through the other flow channel 60′ and the flow channel 60 into the connecting tube 13 the base 10 by reciprocating movement of the slider block 30 so as to pump the fluid successively in the reverse direction.

As shown in FIG. 15, the cover 50 has an end face formed with an annular groove 52, and the rotor 20 has an end face formed with a protruding limit ring 25 pivotally mounted in the annular groove 52 of the cover 50, so that the rotor 20 is limited by the cover 50 to prevent the rotor 20 from producing vibration during rotation. A gasket 53 is mounted between the limit ring 25 of the rotor 20 and the annular groove 52 of the cover 50 to separate the limit ring 25 of the rotor 20 from the annular groove 52 of the cover 50 to prevent friction therebetween.

Accordingly, the pump is used to pump the fluid in two opposite directions by changing the rotation direction of the rotor 20 without having to change the parts of the pump, thereby enhancing the versatility of the pump, and thereby facilitating a user operating the pump. In addition, the pump has a simple apparatus with a lighter weight and smaller volume, thereby decreasing the space of operation and storage.

Although the invention has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the true scope of the invention. 

1. A pump, comprising: a base including a disk and an annular wall formed on a periphery of the disk, the annular wall of the base having an inner periphery formed with two radially opposite inward protruding arc-shaped flanges and an outer periphery formed with two radially opposite outward protruding connecting tubes each connected to the inner periphery of the annular wall of the base; a rotor rotatably mounted in the annular wall of the base and having a first side formed with a slideway, the rotor having an outer periphery rested on an inner arcuate face of each of the flanges of the annular wall of the base, thereby forming two radially opposite arc-shaped flow channels between the inner periphery of the annular wall of the base and the outer periphery of the rotor; a slider block slidably mounted in the slideway of the rotor reciprocally and having a mediate portion formed with an insertion recess, the slider block having an axial length smaller than that of the slideway of the rotor, so that two storage chambers are defined between the slideway of the rotor and two ends of the slider block and are connected to the two flow channels respectively; a cover mounted on the annular wall of the base to close the two flow channels; a pivot shaft secured on a bottom of the cover; and a drive member rotatably mounted on the pivot shaft and inserted into the insertion recess of the slider block so that the slider block is slidable on the drive member.
 2. The pump in accordance with claim 1, wherein the flanges of the base are located between the connecting tubes, and an included angle of 90 degrees is defined between each of the flanges and each of the connecting tubes.
 3. The pump in accordance with claim 1, wherein the outer periphery of the annular wall of the base is formed with a plurality of fixing ears, and the cover has a periphery formed with a plurality of fixing ears fixed on the fixing ears of the base by a plurality of bolts and a plurality of nuts.
 4. The pump in accordance with claim 1, wherein the disk of the base has a center formed with a shaft hole, and the rotor has a second side axially formed with a protruding shaft rotatably mounted in and protruded outward from the shaft hole of the base.
 5. The pump in accordance with claim 4, further comprising a shaft seal and a bearing each mounted between the shaft and the shaft hole of the base.
 6. The pump in accordance with claim 1, wherein each of the two flow channels is located between the flanges of the base in a symmetric manner and is connected to a respective one of the connecting tubes of the base.
 7. The pump in accordance with claim 1, wherein the slideway of the rotor is radially extended through an axial center of the rotor and through the outer periphery of the rotor.
 8. The pump in accordance with claim 1, wherein the slideway of the rotor has a width matching that of each of the flanges of the base.
 9. The pump in accordance with claim 1, wherein each of the two ends of the slider block has an arcuate face matching the inner arcuate face of each of the flanges of the base.
 10. The pump in accordance with claim 1, wherein each of the two ends of the slider block is urged on the inner arcuate face of a respective one of the flanges of the base when the slider block is slidable in the slideway of the rotor reciprocally.
 11. The pump in accordance with claim 1, further comprising a seal ring mounted between the cover and the annular wall of the base to provide a sealing effect.
 12. The pump in accordance with claim 1, wherein the pivot shaft has an axial center parallel with that of the rotor and the cover.
 13. The pump in accordance with claim 1, wherein the pivot shaft has an axial center located at a connecting line between the flanges of the base.
 14. The pump in accordance with claim 1, wherein the pivot shaft has an axial center aligning with that of the drive member and deviating from that of the rotor, so that the axial center of the drive member deviates from that of the rotor.
 15. The pump in accordance with claim 14, wherein the drive member is rotatable on the pivot shaft when the rotor is rotated, thereby forming a relative sliding motion between the slider block and the drive member to drive the slider block to slide in the slideway of the rotor reciprocally to change the dimension of the two storage chambers.
 16. The pump in accordance with claim 1, wherein the cover has an end face formed with an annular groove, and the rotor has an end face formed with a protruding limit ring pivotally mounted in the annular groove of the cover.
 17. The pump in accordance with claim 16, further comprising a gasket mounted between the limit ring of the rotor and the annular groove of the cover to separate the limit ring of the rotor from the annular groove of the cover. 